Deuteronomy 32:3 Because I will publish the name of the Lord: ascribe ye greatness unto our God. 4 He is the Rock, his work is perfect: for all his ways are judgment: a God of truth and without iniquity, just and right is he.
The only Person who has never made a mistake is God, and therefore, we must be willing and humble enough to keep on believing His prophets, even if there might be a blip here and there in the writings. Here it is again, an ordained prophet of God is sent by God to tell the people of Nineveh that they have forty days remaining before their entire city would be destroyed.
And even though some might argue that it was one of those conditional prophecies, there is only one problem, Jonah does not inform them that it is a conditional prophecy. Jonah is not bidden to deliver the message with any caveats, because the prophecy was as distinct, and pointed as you can get. Furthermore, according to what is written, Jonah did not even give instruction on what the inhabitants thereof should do to avert the impending doom.
Jonah 2:1 And the word of the Lord came unto Jonah the second time, saying, 2 Arise, go unto Nineveh, that great city, and preach unto it the preaching that I bid thee. 3 So Jonah arose, and went unto Nineveh, according to the word of the Lord. Now Nineveh was an exceeding great city of three days' journey. 4 And Jonah began to enter into the city a day's journey, and he cried, and said, yet forty days, and Nineveh shall be overthrown.
Jonah 4:1 But it displeased Jonah exceedingly, and he was very angry. 2 And he prayed unto the Lord, and said, I pray thee, O Lord, was not this my saying, when I was yet in my country? Therefore I fled before unto Tarshish: for I knew that thou art a gracious God, and merciful, slow to anger, and of great kindness, and repentest thee of the evil.
May Gpd add His blessing to the study of His word. “Good night” and God bless!